Games like Pandamonium
Games like Pandamonium include Blasphemous 2, Afterimage, Momodora: Reverie Under The Moonlight, ANIMAL WELL, and Öoo. We matched them by the tags players give Pandamonium on Steam (Metroidvania, Pixel Graphics, 2D Platformer, 2.5D, and Side Scroller): closest matches first, and among equally close ones the better-known games.

Blasphemous 2
Shared: Metroidvania · Pixel Graphics · 2D Platformer

Afterimage
Shared: Metroidvania · 2D Platformer · Side Scroller

Momodora: Reverie Under The Moonlight
Shared: Metroidvania · 2D Platformer · Pixel Graphics

ANIMAL WELL
Shared: Metroidvania · Pixel Graphics · Puzzle

Öoo
Shared: Metroidvania · 2D Platformer · Puzzle Platformer

SANABI
Shared: Pixel Graphics · 2D Platformer · Action-Adventure

HAAK
Shared: Metroidvania · Pixel Graphics · Puzzle Platformer

Trine 2: Complete Story
Shared: 2D Platformer · Action-Adventure · Puzzle Platformer

Skul: The Hero Slayer
Shared: Pixel Graphics · Metroidvania · Indie

Webbed
Shared: 2D Platformer · Pixel Graphics · Puzzle Platformer

Anomaly Agent
Shared: 2D Platformer · Side Scroller · Hack and Slash

Bloodstained: Ritual of the Night
Shared: Metroidvania · Side Scroller · 2.5D

Prince of Persia The Lost Crown
Shared: Metroidvania · 2D Platformer · Side Scroller

Frontier Hunter: Erza’s Wheel of Fortune
Shared: Metroidvania · Side Scroller · 2D Platformer

Iconoclasts
Shared: Pixel Graphics · Metroidvania · Indie

Dead Cells
Shared: Metroidvania · Pixel Graphics · Hack and Slash

The Messenger
Shared: Metroidvania · Pixel Graphics · Platformer

Owlboy
Shared: Pixel Graphics · Metroidvania · Platformer

F.I.S.T.: Forged In Shadow Torch
Shared: Metroidvania · 2D Platformer · Platformer

Ori and the Will of the Wisps
Shared: Metroidvania · Platformer · Action-Adventure

Katana ZERO
Shared: Pixel Graphics · 2D Platformer · Platformer

Celeste
Shared: Pixel Graphics · 2D Platformer · Platformer

The Pedestrian
Shared: Side Scroller · 2D Platformer · Puzzle Platformer

Rabi-Ribi
Shared: Metroidvania · Pixel Graphics · Action-Adventure